Combined safety valve and signal for pneumatic tires



June 23, 1925. I 1,543,077

J. i4. @ALL E1 AL @GBBINED SAFETY VALVE AND SIGNAL FOR PNEUMATIC TIRES Filed Oct. 5, 1922 I. WITNESS INVENTORS A i! swansm I I M/AMM 26 monuns when pressure To all whom '2, may conoem:

Pa tented June 23, 1925 1 UNITED JO N HAMIL'roNeALL aNnGosfsWfANsoN, or MARS F I L oR GoN.

oolvrniivnn SAFETY V L E A ND" is IeNAL" Foe;. em mimkmmsi Applicationfiled October 3, 1922. S eria1 No. 592,124;

Beit known that e, JOHN- citizen of the United States, and Gus SWAN? soN', a'subjectof the King of,Swede11, and residents of Marshfield, in the; county of a specification.

" Our invention-i is a sists in the combinations, constructions vand arrangements herein, described and claimed; An object-of-our invention-1s to pPOVlCle ZL' device of the character described vwh1ch- 1S adapted to bevattached to a conventional in;

nor tube orpneumatictirefor automobiles in an ordinary maimer andfwhic h embodies meansoperabletogpermlt the inflation ofzthe,

tire or tube-to which applied and fo'r pre venting the escape ofpress -ure fluid from the the or tube until excess pressure develops therein" or' until the pressure within? the tire or tube sufficiently 'low'tofpe'rmit' the partial collapse thereof when injservice, Whereupon pressurelfiuid will be permitted "to QSCclPE the tire olf device. 7 H c s A further object o'urfiinvention is to An annularshOuIderS"is thus definedibev u,

tween the inner end i'portion 5 and the inter-- provide a device of thecharacter described which is adapted to give an audible signal A still further object of our invention is to provide a device ofthe' character 'described. which includes "high pressure relief means adjustable to. operate-at various predetermined pressures and meansfor indi the relief means will'be actuated.

A stillfurther'objeot of our invention is eatin at a given time the pres sure-at which to provide a device of the character def j claims. f V, p

Our invention 1s illustrated in the acco'mpanying drawings,- forming a part ,of this scribed which is-simple .in construction, effestive for the purpose intended cand thor f oughly practical commercially.

Other objectsand advantages willi'be ap parent from thefollovvingdescription and the novelrfeatures ofthe invention willlbe in the appended particularly outlined application in which: V.

Figure 1 isa longitudinal section through:- a practical embodiment of tllE'lIIVBDtIOIl 1n ment of the v v a H I IFigure l comb ned safety-valve and signal forpnemnaticitires and it con:

fluidfis escaping" there 1 into thelouter end shoulder 9.. r

V i The sh0ulder29 is providedwithanannu- 1 tion of thelatter'beingi shown more or [less diagrammatic-ally, p

Figure: 3 is a. perspective view o-fan- 3dr:

F gure l; v

In carrying out our invention, 1 We provi de a tubularstem or body l whichis formed at one endas at-2for-engagementin 'anordii- V [a 1 nary man-neruwiththeusualopening in a pneumatic'tub'e or tire 3. 'The stem ,orbody' V 1 may be screw threaded externally;as at l I F for part 'or' allof -its length forlengagemen't with any ordinary threaded means for lock- 'ing the stemtoi a vWheel rim (not shown) j justing; bushing comprised in the embodi-i nvention exhibited in Figural, l V

i's'ection alongtheline 4 015 f upon which the atire or tube 3 imay' .b'e-

The-longitudinal bore ofzthe stem '1 comv prises an Linnea ende portionz f uniform o diameter andfliexteiidingiadetermined distance from theend o-f the stem attached to v greaterl diameter thanthe'end portion fi,

-' tube or fftire fan intermediate portion 6 of cliameter -'tl1an ftheaintermediate portion 6. c

mediate ortion 6 andythe latter vis merged lar groove-10'iniitsfface'=anda va-lveafdiso 11;

end to seat i-n'thegroovefinsuch manner as 'i to compress inthe groovea packing ring of rubber or oth'er compressible material." The valve; disc 11' "isiformed' with a -central open valve stem il i-and the 'wallf'of the bore tion 6. I i i" w R.

Abushingfl5 has'ia portion provided with external screw threads; "16 for engaging screw threads .17 jonthe-l -wallsof 'thefbore I portion 7;An expansion spring lSofcoil 1 formation 2'i's'intei1posed between. the bushing 15vandtheivalvedisc ll and exertsja-pres= ingl3 from which-a tubular valvestem l l' 1 7 v 1 extends, in: concentric relation to v the flange 12 and beyond the shoulder 9 into the-bore i-jportioni6, being'loosely re'ceiVed in'the-Iatter, so thata space is providedbetween the V Figure 2: section along the line" 2-2 portion 7by an'annular 9 V time-will be the same,

sure on the latter tending to hold the flange 12 against its seat The pressure on the valve disc 11 can be adjusted by turning the bushing 1.5.relativelyto the stem 1 to vary the tension on the spring 18.

A look nut19'isadapted, to engage with the threads16 to hold the adjusting bushing in adjusted position. he lock nut is. pro vided with a counterbore 20 at its inner end adapted to receive-a gasketZl madeof a compressible material which is compressed against the outer end of the stem 1 when the lock-nut-19 isscrewedr into abutting relation to the stem 1 and a fluid tight joint between the stenrland: the bushing 15 is thus insured. I

A portion of thebushing. l5iextending beyond the nut 19 is formed to provide a pluralitry offlat. faces 22;;6ZlChrOlENVhlCl1, is provided with a scale 23, the graduations of which {mayhave. any suitable :indicia (not Sl'lOW-ll') associated therewith, as for instance, poundsper square inch to indicate various pressures at which-:thevalve disc 11 'will I )e moved into, open position ag ;ainstv the action of: the spring 18 to-permit the escape of excess pressure fluid; from the tube or tire 3. The. outer end or face ofthe lock nut 19rcooperateswvhenin abutting relation to the stem 11 with. the scales 23 to indicate on the latter the pressure at which the valve 11 will; open. at any givenatiine, therespece tive scal'esbeing soarranged, that the indicated pressureson all scales at any given It; will: thus a be 1 apparent: that the valve 11 is agrelief valve adaptedwto open atnpredetermined pressures to prevent excessive pressureswithin thetubeor tire3 because of overheating of; the: pressure fluid, therein or other causes. Area-p24 threadedly engaging, the bushing 15'adjacent. to its outer end. includes an elongated hollowbody divided beyond the end of the bushing by a transverse partition I 25.- Arcuate apertures 26, formed through. the walls .of the 1 cap 24: extend abover-andobelow theplane of the partitioni25 and are separated orspaced apartbyintervening imperforate portions 27 the. partition25 being rigidly secured at its outer edge to the imperforate-portions 27.

A tubular. cover:28 encompassing the cap 24: andthe-body1is providedatflits free end with apertures 28. ofwrelatively small are-a1 v a A whistling soundrwill thus be caused by reason of-ithe escape of-a pressurerfiuid through the stein-1 and through the open: lugs 26 of the cap 24 and the apertures 28- of the cover 28. r V

An inwardly opening valve 29preferably although not; necessarily providedv with a facing 30 of acompressible material, such as rubber, is loosely received withinthe bore portion or chamber 6 betweenthe inner end an axial socket 34' threadedly engaging the outer end portion of the section 31'. The

sect-ion 32- is ofa length to extend loosely through the bore of the bushing 15 and to protrude slightly beyond the outer end of the latter; An expansion-spring35 coiled about the section 31 between the valve disc" V 11 and the proximate end of theenlargeinent 33'tends to holdthe valve 29in closing relation to the tubular valvestein- 14. When it is desired to force'a pressure fluid into thetube or tire 3; as in inflating the latter in an ordinary manner, the valve '29 is forced and held awayfroin' its seat by a pressure applied 'at the end of the stem: Upon cessation of the pressure head 36loosely receivedvv-ithin the bore portion or valve-chamber 6 between the valve 29; and the shoulder 8, the plunger head being provided with a stem 37 extending looselythrough the inner end portion 5 of the bore ofthe steini-l' and protruding beyond theinner end of the latter an: appre-- ciabledistancewithinthe tube orwtire 3. A bumper head 38 made of a relatively soft material such as=soft rubber or other compressible material which will not cut or injurethe walls of the tube or tire 3 when in violent contact therewith issecured on the inner end of the'plunger stem '37. The

, partially collapsed uponwrotation in service of a wheel upon which the-tube or tire is mounted, the w-alls 'of the tube or tire 3 opposite the inner end of the stem will contact the plunger head 38 at each revolution of the wheel and: willdrive the plunger. head 36 against the valve'29, moving the latter and the valve stenill as a unit toward the outer end of the stem, whereby the valve 1 which intended.

audible signal as hereinbefore described, and apprising interested persons'of the condition of the tube ortire. I

a The devicefis simple in'construction and I purposes for able at'one'endfto a sourceof, pressure, said body being-provided -with' an outwardly facing internal shoulder' located intermedi-c, i ate its length, a valve member fitting in the thoroughly effective for the Obviously, our invention is susceptible of embodiment in forms other thanthatwhich illustrated in the accompanying drawings and we therefore consider-as our modifications 3 and vadaptations I thereof which fairly fall within the scope of the appended claims. r I

own all VVe claim I 1. Adevice ofthe character describedcom l prising a tubular body adapted at one end for attachment to a'pneumatic tube-or tire,

outwardly opening normally closed spring pressed valve'means therein for controlling the bore of the tubular body, signal means adapted to be operated by pressure fluid escaping from the'tub'e or tire through the tubular-body, and means extending from the tubular body into "the; pneumatic, vtube or tire 'andadapted'to be actuated upona partial collapse of thewalls of: the latter to move the valve means from closing position, said last named means comprising a stem 7 movable longitudinally inthe-bore of the tubular body, a plunger head atthe'end of -body when compressed.

described.

'the stem adjacent to the valve means but separate therefrom and a. bumper head at compressiblematerial and being adapted to be drawn throughlthe bore of the tubular 2. A device of the 7 comprising a, straight tubular body attachboreof said body outwardly of said shoulden and being spring pressed against said I shoulder, said valve member having a. central opening, a valve stem 'extendingfrom the end of therod disposed within tube or tirefsaid bumper head being made of a soft character described I said valve member inwardly of the tubular V bodyzin alignment fwith 'the central opening I v in "the valve member, said' 'va1vestem being} 1 55 T f disposed in spaced relation to the bore of said tubular body, a second 'valvemember spring pressed'against theinnerend of said flow through the latter, and a valve stem for operating" said second valve, saidlast central-opening f'the first named valve to --ter1ninate at its outer end outwardly' of 3 the first-named valve, as and for the purpose ,JOHN HAMILTON GALLL geusswAnsouj tubular valve stem and normally preventing I named valve stem extending throughsaid first named valve stem and through the 

